FUJIC was the first stored-program

Von Neumann architecture

The term Von Neumann architecture, aka the Von Neumann model, derives from a computer architecture proposal by the mathematician and early computer scientist John von Neumann and others, dated June 30, 1945, entitled First Draft of a Report on the EDVAC...

 computer built in Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. It was finished in March 1956, the project having been effectively started in 1949, and was essentially built almost entirely by one person – Dr. Okazaki Bunji. Originally designed to perform calculations for lens design by Fuji

Fujifilm

is a multinational photography and imaging company headquartered in Tokyo, Japan.Fujifilm's principal activities are the development, production, sale and servicing of color photographic film, digital cameras, photofinishing equipment, color paper, photofinishing chemicals, medical imaging...

, the ultimate goal of FUJIC's construction was to achieve a speed 1,000 times that of human calculation for the same purpose – amazingly, the actual performance achieved was double that number.

Employing approximately 1,700 vacuum tube

Vacuum tube

In electronics, a vacuum tube, electron tube , or thermionic valve , reduced to simply "tube" or "valve" in everyday parlance, is a device that relies on the flow of electric current through a vacuum...

s, the computer's word length was 33 bit

Bit

A bit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states...

s. It had an ultrasonic

Ultrasound

Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Ultrasound is thus not separated from "normal" sound based on differences in physical properties, only the fact that humans cannot hear it. Although this limit varies from person to person, it is...

 mercury delay line memory

Delay line memory

Delay line memory was a form of computer memory used on some of the earliest digital computers. Like many modern forms of electronic computer memory, delay line memory was a refreshable memory, but as opposed to modern random-access memory, delay line memory was serial-access...

 of 255 words, with an average access time of 500 microseconds. An addition or subtraction was clocked at 100 microseconds, multiplication at 1,600 microseconds, and division at 2,100 microseconds.

Used extensively for two years at the Fuji factory in Odawara, it was given later to Waseda University

Waseda University

, abbreviated as , is one of the most prestigious private universities in Japan and Asia. Its main campuses are located in the northern part of Shinjuku, Tokyo. Founded in 1882 as Tokyo Senmon Gakko, the institution was renamed "Waseda University" in 1902. It is known for its liberal climate...

 before taking up residence in the National Science Museum of Japan

National Science Museum of Japan

The is located in the northeast corner of Ueno park in Tokyo. Opened in 1871, the museum has had several names, including Ministry of Education Museum, Tokyo Museum, Tokyo Science Museum, the National Science Museum of Japan, and currently the National Museum of Nature and Science as of 2007...

 in Tokyo

Tokyo

, ; officially , is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the center of the Greater Tokyo Area, and the largest metropolitan area of Japan. It is the seat of the Japanese government and the Imperial Palace, and the home of the Japanese Imperial Family...

.